Abstract
Thermal properties of Pb[(Zn 1/3Nb 2/3) 0.93Ti 0.07]O 3 (PZNT) crystals have been investigated as a function of temperature. The DTA curve shows PZNT crystals begin to melt at 1154.9 °C. The TGA curve shows the weight loss in the PZNT crystals is about 1.24% at 1290 °C. At room temperature, the specific heat of PZNT crystals is about 0.358 J g −1 K −1. The thermal diffusivity and the thermal conductivity for PZNT crystals are about 0.326 mm 2 s −1 and 1.022 W m −1 K −1 at 298 K, respectively. The thermal expansion coefficient of PZNT crystals decreases quickly from 298 to 326 K, and an anomaly appears at 376 K due to the ferro–ferroelectric phase transition. The thermal expansion coefficient changes slowly from 544 to 1070 K.
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